EP1561992B1 - Flexible air-duct with internal insulation from foamed polyethylene - Google Patents

Flexible air-duct with internal insulation from foamed polyethylene Download PDF

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Publication number
EP1561992B1
EP1561992B1 EP05386003A EP05386003A EP1561992B1 EP 1561992 B1 EP1561992 B1 EP 1561992B1 EP 05386003 A EP05386003 A EP 05386003A EP 05386003 A EP05386003 A EP 05386003A EP 1561992 B1 EP1561992 B1 EP 1561992B1
Authority
EP
European Patent Office
Prior art keywords
external
internal
air hose
flexible air
foamy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05386003A
Other languages
German (de)
French (fr)
Other versions
EP1561992A1 (en
Inventor
Davlaras Apostolos
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apostolos Davlaras
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP07015163A priority Critical patent/EP1870629A3/en
Publication of EP1561992A1 publication Critical patent/EP1561992A1/en
Application granted granted Critical
Publication of EP1561992B1 publication Critical patent/EP1561992B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0263—Insulation for air ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
    • F16L11/081—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more layers of a helically wound cord or wire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0218—Flexible soft ducts, e.g. ducts made of permeable textiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0245—Manufacturing or assembly of air ducts; Methods therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0281—Multilayer duct

Definitions

  • the invention refers to a new type of flexible air hose having extruded polyethylene foam insulation between it's internal and external walls.
  • the flexible air hoses are manufactured having as a base a wire skeleton made of steel or other metal.
  • the skeleton helicoidally distributed along the length of the hose lies between the internal and external wall of the air hose.
  • These walls are either polyester or aluminum foils, with or without coating and color, depending on the application the hose will be used for.
  • These flexible air hoses are used for hot or cold air distribution, they may carry insulation within their internal and external walls.
  • the insulating material is usually glass wool.
  • the insulation thickness is such, as to minimize the heat losses to or from the environment.
  • the problem arising by using such flexible air hoses is that when the insulation is quite thick, their flexibility decreases while their weight increases.
  • undesirable condensation of air humidity takes place on their exterior surfaces, having negative effects on their installation, especially over phony ceilings.
  • the proposed invention is a flexible air hose of diameters ranging from 100 to 500 mm, consisting of a spiral wire skeleton and insulating leaf of foamy polyethylene, between the interior and the exterior wall of the air hose, either made of polyester or aluminum.
  • the advantage of this invention is that the use of insulating material made by foamy polyethylene results in the reduction of the air humidity on the exterior walls of flexible air hose.
  • Another advantage is that the required insulation thickness for a certain application is smaller than the corresponding thickness of glass wool, for the same insulating results. This leads to weight reduction and increased air hose flexibility.
  • US-3,289,703 discloses a flexible hose and method of making the same wherein a coil of resilient material, such as steel wire and the like is embedded in matrix of foamed elastic material being generally in the shape of a hollow cylindrical body or tubulation.
  • the outer and inner wall surfaces of the foamed elastic material are provided with impervious skins, such skins being produced either by suitable treatment of the hose body or by employing thin tubular jackets of solid, elastic, plastic material, such as vinyl plastic or the like.
  • Such a flexible hose is manufactured at predetermined length through a casting method that is considered to provide for high rate mass production at a relatively low unit cost and is proposed to serve applications, such as that of the flexible hose employed in the coupling of the suction nozzle of a vacuum cleaner with the collection chamber thereof.
  • the contents of the above US-3,289,703 relevant to the subject-matter of the invention are appropriately incorporated in the preamble of claim 1.
  • the flexible air hose is cylindrical, with diameters from 100 to 500 mm and various lengths, manufactured by an internal and external wall between which metal skeleton and insulating material are interfered.
  • the metal skeleton is manufactured as a wire of thickness 0,3 - 5 mm and has helical distribution along the air hose length with spiral step of 10 - 100 mm.
  • a foamy polyethylene leaf of thickness 0,5 - 5 mm acts as insulation.
  • the internal and external walls of the air hose are either foils of polyester, of any coloration and having whatever internal - external coating, and thickness from 0,006 to 0,2 mm, or aluminum foils of any coloration and having whatever internal - external coating, and thickness from 0,001 to 0,2 mm.
  • the internal and external wall of the flexible air hose can be either from the same material, that is to say polyester or aluminum, or the external from polyester and the internal from aluminum.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Thermal Insulation (AREA)
  • Duct Arrangements (AREA)

Abstract

It is an improved flexible air covering used for hot or cold gas transfer in buildings for heating or even cooling of the spaces of a building, which consists of a metal or even a plastic skeleton of helical shape (3) having an outer covering (2) or without, made of finished polyester leaf, or finished leaf of aluminum or even of any other suitable material and internally having insulation of foamed insulating material (4) polyethylene or and ether ethylene products or even any other suitable foamed material covered by a synthetic film or any other suitable material or without (5) with circular form. The air covering is used either beat or in straight obvious application in installations of cooling and heating colored or nut and in any other geometrical pattern (square, triangle, parallelogram. e.t.c.)

Description

  • The invention refers to a new type of flexible air hose having extruded polyethylene foam insulation between it's internal and external walls.
  • The flexible air hoses are manufactured having as a base a wire skeleton made of steel or other metal. The skeleton helicoidally distributed along the length of the hose lies between the internal and external wall of the air hose. These walls are either polyester or aluminum foils, with or without coating and color, depending on the application the hose will be used for. Because these flexible air hoses are used for hot or cold air distribution, they may carry insulation within their internal and external walls. The insulating material is usually glass wool. The insulation thickness is such, as to minimize the heat losses to or from the environment. The problem arising by using such flexible air hoses is that when the insulation is quite thick, their flexibility decreases while their weight increases. Furthermore, in cases when the flexible air hoses are used for cool air distribution in air conditioning systems, undesirable condensation of air humidity takes place on their exterior surfaces, having negative effects on their installation, especially over phony ceilings.
  • The proposed invention is a flexible air hose of diameters ranging from 100 to 500 mm, consisting of a spiral wire skeleton and insulating leaf of foamy polyethylene, between the interior and the exterior wall of the air hose, either made of polyester or aluminum. The advantage of this invention is that the use of insulating material made by foamy polyethylene results in the reduction of the air humidity on the exterior walls of flexible air hose. Another advantage is that the required insulation thickness for a certain application is smaller than the corresponding thickness of glass wool, for the same insulating results. This leads to weight reduction and increased air hose flexibility.
  • US-3,289,703 discloses a flexible hose and method of making the same wherein a coil of resilient material, such as steel wire and the like is embedded in matrix of foamed elastic material being generally in the shape of a hollow cylindrical body or tubulation. The outer and inner wall surfaces of the foamed elastic material are provided with impervious skins, such skins being produced either by suitable treatment of the hose body or by employing thin tubular jackets of solid, elastic, plastic material, such as vinyl plastic or the like. Such a flexible hose is manufactured at predetermined length through a casting method that is considered to provide for high rate mass production at a relatively low unit cost and is proposed to serve applications, such as that of the flexible hose employed in the coupling of the suction nozzle of a vacuum cleaner with the collection chamber thereof.
    The contents of the above US-3,289,703 relevant to the subject-matter of the invention are appropriately incorporated in the preamble of claim 1.
  • DE 75 14 049 U discloses a flexible air hose made of foamy polyethylene used in air-conditioning.
  • According to the realization of the present invention, the flexible air hose is cylindrical, with diameters from 100 to 500 mm and various lengths, manufactured by an internal and external wall between which metal skeleton and insulating material are interfered. The metal skeleton is manufactured as a wire of thickness 0,3 - 5 mm and has helical distribution along the air hose length with spiral step of 10 - 100 mm. A foamy polyethylene leaf of thickness 0,5 - 5 mm acts as insulation. The internal and external walls of the air hose are either foils of polyester, of any coloration and having whatever internal - external coating, and thickness from 0,006 to 0,2 mm, or aluminum foils of any coloration and having whatever internal - external coating, and thickness from 0,001 to 0,2 mm. The internal and external wall of the flexible air hose can be either from the same material, that is to say polyester or aluminum, or the external from polyester and the internal from aluminum.

Claims (4)

  1. Flexible air hose having a circular cross-section made from a layer of foamy polyethylene with an external and an internal wall surrounding said foamy polyethylene layer and a helicoidally wound metallic wire extending in between said external and internal walls of said foamy polyethylene layer along the air hose length, characterized by that said foamy polyethylene layer is a selected quality of extruded polyethylene foam having specific insulating properties for the minimization of losses of hot or cold air distributed through said flexible air hose and said external and internal walls are polyester or aluminium foils having selected internal and/or external coating, said external and internal walls being attached onto said foamy polyethylene layer through thermal welding, glue or high frequency processing, wherein said flexible air hose has a diameter within a range of 100-500 mm, said foamy polyethylene layer has a thickness within a range or 0.5-5 mm and said metallic wire has a thickness within a range of 0.3-5 mm and a spiral step from 10 to 100 mm.
  2. Flexible air hose as claimed in above claim 1 adapted to be used for hot or cold air distribution, wherein both said external and internal walls are polyester foils having selected internal and/or external coating and a thickness ranging from 0.006 - 0.2 mm.
  3. Flexible air hose as claimed in above claim 1 adapted to be used for hot or cold air distribution, wherein both said external and internal walls are aluminium foils having selected internal and/or external coating and a thickness ranging from 0.001 - 0.2 mm.
  4. Flexible air hose as claimed in above claim 1 adapted to be used for hot or cold air distribution, wherein one of said external and internal walls is a polyester foil having selected internal and/or external coating and a thickness ranging from 0.006 .. 0.2 mm and the other one of said external and internal walls is an aluminium foil having selected internal and/or external coating and a thickness ranging from 0,001 o.2 mm.
EP05386003A 2004-02-04 2005-01-25 Flexible air-duct with internal insulation from foamed polyethylene Active EP1561992B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07015163A EP1870629A3 (en) 2004-02-04 2005-01-25 Flexible air-duct with internal insulation of foamed polyethylene

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GR20040100038 2004-02-04
GR2004100038 2004-02-04

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP07015163A Division EP1870629A3 (en) 2004-02-04 2005-01-25 Flexible air-duct with internal insulation of foamed polyethylene

Publications (2)

Publication Number Publication Date
EP1561992A1 EP1561992A1 (en) 2005-08-10
EP1561992B1 true EP1561992B1 (en) 2009-05-13

Family

ID=33446256

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07015163A Withdrawn EP1870629A3 (en) 2004-02-04 2005-01-25 Flexible air-duct with internal insulation of foamed polyethylene
EP05386003A Active EP1561992B1 (en) 2004-02-04 2005-01-25 Flexible air-duct with internal insulation from foamed polyethylene

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07015163A Withdrawn EP1870629A3 (en) 2004-02-04 2005-01-25 Flexible air-duct with internal insulation of foamed polyethylene

Country Status (4)

Country Link
EP (2) EP1870629A3 (en)
AT (1) ATE431520T1 (en)
DE (1) DE602005014400D1 (en)
GR (1) GR1004701B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007110860A2 (en) * 2006-03-24 2007-10-04 G.L.V. International (1995) Ltd. Semi-rigid flexible duct
US20100186846A1 (en) * 2009-01-23 2010-07-29 Carlay Ii Ronald L Flexible HVAC duct and method of use
TR201009124A1 (en) * 2010-11-04 2012-02-21 Köse Hi̇kmet Fully laminated flexible ventilation duct
ES2514965B1 (en) * 2013-04-25 2016-01-22 Cikautxo, S.Coop. Gas recirculation tube of a combustion engine and method for manufacturing said tube
US9784469B2 (en) * 2015-05-20 2017-10-10 Rite-Hite Holding Corporation Fabric silencers for air ducts

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289703A (en) * 1963-12-20 1966-12-06 Electrolux Corp Flexible hose and method of making the same
DE7514049U (en) * 1975-05-02 1976-10-07 Fa. Carl Freudenberg, 6940 Weinheim THERMAL INSULATED AND CONSTANT CROSS SECTION HOSE
DE2749665A1 (en) * 1977-11-05 1979-05-10 Eckhard Faehnrich Sound dampening flexible pipe - has porous wall sealed on outside and braced by spiral insert
IT1124638B (en) * 1979-10-24 1986-05-07 Pirelli THERMAL INSULATED CONDUCT
JPH07174292A (en) * 1993-12-17 1995-07-11 U C Sangyo Kk Heat insulating hose
JPH1182862A (en) * 1997-08-29 1999-03-26 Inoac Corp Flexible hose
JP2002130584A (en) * 2000-10-25 2002-05-09 Uc Industrial Co Ltd Heat insulation hose

Also Published As

Publication number Publication date
EP1870629A2 (en) 2007-12-26
DE602005014400D1 (en) 2009-06-25
ATE431520T1 (en) 2009-05-15
EP1561992A1 (en) 2005-08-10
GR1004701B (en) 2004-10-18
EP1870629A3 (en) 2008-06-11

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